Percentage Calculator

Calculate percentages quickly and accurately using our online calculator. Select the type of calculation you need — percentage of a value, proportion between values, percentage increase, or percentage decrease. Enter the required numbers, click “Calculate,” and get the result instantly.

Online percentage calculators simplify calculations, reduce errors, and save time.

How to Calculate a Percentage

Calculating a percentage helps determine how much a specific portion represents relative to a total value.

For example, to calculate 15% of $300, convert 15% into decimal form (0.15) and multiply:

0.15 × 300 = $45

In this case, $45 represents 15% of $300.

To simplify the process, use our online percentage calculator:

1. Enter the percentage
2. Enter the total value
3. Click “Calculate”

How to Calculate a Percentage Share

Calculating a percentage share helps compare a specific value to a larger amount, expressed as a percentage.

For example, to determine what percentage $300 represents of $5,000:

300 ÷ 5,000 × 100 = 6%

This means $300 represents 6% of $5,000.

Use our percentage calculator:

1. Enter the value you want to compare
2. Enter the total value
3. Click “Calculate”

How to Calculate Percentage Increase

A percentage increase shows how much a value grows relative to its original amount.

For example, if you start with $1,500 and apply a 10% increase:

1,500 × 0.10 = $150
1,500 + 150 = $1,650

Use our percentage increase calculator:

1. Enter the initial value
2. Enter the increase percentage
3. Click “Calculate”

How to Calculate Percentage Decrease

A percentage decrease shows how much a value is reduced relative to its original amount.

For example, if an item originally cost $1,500 and now costs $1,000:

1,500 – 1,000 = $500 (reduction)
500 ÷ 1,500 × 100 = 33.33%

This means the item was discounted by 33.33%.

Use our percentage decrease calculator:

1. Enter the initial value
2. Enter the decrease amount
3. Click “Calculate”